U.S. patent application number 14/222043 was filed with the patent office on 2014-07-24 for solar module.
This patent application is currently assigned to SANYO ELECTRIC CO., LTD.. The applicant listed for this patent is SANYO ELECTRIC CO., LTD.. Invention is credited to Shuji Fukumochi, Yosuke Ishii, Yoshiyuki Kudo, Ryota Morikawa, Tomonori Tabe.
Application Number | 20140202518 14/222043 |
Document ID | / |
Family ID | 47994842 |
Filed Date | 2014-07-24 |
United States Patent
Application |
20140202518 |
Kind Code |
A1 |
Tabe; Tomonori ; et
al. |
July 24, 2014 |
SOLAR MODULE
Abstract
A solar module with improved output characteristics is provided.
The solar module (1) includes a photoelectric conversion unit (23),
a solar cell (20) having a first electrode (21) and a second
electrode (22), and a wiring member (32a). The wiring member (32a)
has resin film (51) and wiring (52) arranged on the resin film
(51). The wiring member (32a) has a first portion (32a1), a second
portion (32a2) and a bent portion (32a3). The first portion (32a1)
is arranged so the wiring (52) faces the solar cell (20) side. The
first portion (32a1) is bonded to the solar cell (20). The second
portion (32a2) is arranged so the wiring (52) faces the reverse
side from the solar cell (20). The bent portion (32a3) connects the
first portion (32a1) and the second portion (32a2). The bent
portion (32a3) is arranged on the solar cell (20).
Inventors: |
Tabe; Tomonori;
(Ampachi-gun, JP) ; Kudo; Yoshiyuki; (Otsu-shi,
JP) ; Ishii; Yosuke; (Osaka, JP) ; Morikawa;
Ryota; (Shiki-gun, JP) ; Fukumochi; Shuji;
(Osaka, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SANYO ELECTRIC CO., LTD. |
Osaka |
|
JP |
|
|
Assignee: |
SANYO ELECTRIC CO., LTD.
Osaka
JP
|
Family ID: |
47994842 |
Appl. No.: |
14/222043 |
Filed: |
March 21, 2014 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/JP2012/059629 |
Apr 9, 2012 |
|
|
|
14222043 |
|
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|
Current U.S.
Class: |
136/244 ;
136/256 |
Current CPC
Class: |
H01L 31/0508 20130101;
H01L 31/0201 20130101; H01L 31/0512 20130101; H01L 31/0516
20130101; Y02E 10/50 20130101; H01L 31/022441 20130101 |
Class at
Publication: |
136/244 ;
136/256 |
International
Class: |
H01L 31/0224 20060101
H01L031/0224; H01L 31/05 20060101 H01L031/05 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 29, 2011 |
JP |
2011-213704 |
Claims
1. A solar module comprising: a solar cell having a photoelectric
conversion unit with a first main surface and a second main
surface, and a first electrode and a second electrode arranged on
the second main surface; and a wiring member having resin film, and
wiring arranged on the resin film and connected electrically to
either the first electrode or the second electrode; the wiring
member having a first portion arranged so the wiring faces the
solar cell side and is bonded to the solar cell, a second portion
arranged so the wiring faces the reverse side from the solar cell,
and a bent portion connecting the first portion and the second
portion, the bent portion being arranged on the solar cell.
2. The solar module according to claim 1 further comprising metal
foil connected electrically to the wiring in the second portion,
the wiring being arranged on an end portion of the solar cell in
one direction from one side to the other side of the end portion in
another direction orthogonal to the one direction, and the metal
foil is bonded to a portion of the wiring in the other
direction.
3. The solar module according to claim 2, wherein the metal foil is
thicker than the wiring.
4. The solar module according to claim 2, wherein the metal foil is
drawn from the solar module.
5. The solar module according to claim 2, wherein a plurality of
solar cells are connected electrically by wiring members, and the
metal foil connects the wiring members to each other.
6. The solar module according to claim 1 further comprising: a
first protecting member arranged on the first main surface side of
the solar cell; a second protecting member arranged on the second
main surface side of the solar cell and having flexibility; and a
sealing material layer arranged between the first protecting member
and the second protecting member, and sealing the solar cell.
7. The solar module according to claim 6, wherein the sealing
material layer includes a non-crosslinked resin.
8. The solar module according to claim 1, wherein an opening is
provided in the wiring in the bent portion.
9. The solar module according to claim 8, wherein a plurality of
openings is provided.
10. The solar module according to claim 9, wherein each of the
first electrode and the second electrode include a plurality of
interdigitated finger portions, the wiring has a wiring main body
provided with openings, and a plurality of linear portions
connected to the wiring main body and connected electrically to the
finger portions, and the spacing of the openings is greater than
the width of the linear portions.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation of International Application
PCT/JP2012/059629, with an international filing date of Apr. 9,
2012, filed by applicant, the disclosure of which is hereby
incorporated by reference in its entirety.
FIELD OF THE INVENTION
[0002] The present invention relates to a solar module.
BACKGROUND
[0003] Solar modules having back contact solar cells are known to
be solar modules with better photoelectric conversion efficiency.
An example is described in Patent Document 1. The solar module
described in Patent Document 1 includes a plurality of back contact
solar cells, and a circuit board with wiring arranged on the
surface. The solar cells are installed in one direction on the
circuit board with the back surface sides of the solar cells facing
the circuit board, and are connected electrically to the circuit
board. The circuit board is bent in the direction opposite the
solar cells to the outside of the area in which the solar module is
provided.
Prior Art Documents
Patent Documents
[0004] Patent Document 1: Laid-Open Patent Publication No.
2009-43842
SUMMARY Problem Solved by the Invention
[0005] In recent years, there has been growing demand for solar
modules with even better output characteristics.
Means of Solving the Problem
[0006] The solar module in the present invention includes a solar
cell and a wiring member. The solar cell has a photoelectric
conversion unit, a first electrode, and a second electrode. The
photoelectric conversion unit has a first main surface and a second
main surface. The first electrode and the second electrode are
arranged on the second main surface. The wiring member has resin
film and wiring. The wiring is arranged on the resin film. The
wiring is connected electrically to the first electrode and the
second electrode. The wiring member has a first portion, a second
portion, and a bent portion. The first portion is arranged so that
the wiring faces the solar cell side. The first portion is bonded
to the solar cell. The second portion is arranged so that the
wiring is facing the reverse side from the solar cell. The bent
portion is connected to the first portion and the second portion.
The bent portion is arranged on the solar cell.
Effect of the Invention
[0007] The present invention is able to provide a solar module with
improved output characteristics.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a simplified rear view of the solar module in an
embodiment.
[0009] FIG. 2 is a simplified cross-sectional view from line II-II
in FIG. 1.
[0010] FIG. 3 is a simplified rear view of a solar cell in the
embodiment.
[0011] FIG. 4 is a simplified cross-sectional view of the solar
cell string in section IV of
[0012] FIG. 2.
[0013] FIG. 5 is a simplified cross-sectional view of the solar
cell string in section V of FIG. 2.
[0014] FIG. 6 is an expanded view of the wiring member 32 in a
modified example.
DETAILED DESCRIPTION
[0015] The following is an explanation of examples of preferred
embodiments of the present invention. The following embodiments are
merely examples. The present invention is not limited by the
following embodiments in any way.
[0016] Further, in each of the drawings referenced in the
embodiments, members having substantially the same function are
denoted by the same symbols. The drawings referenced in the
embodiments are also depicted schematically. The dimensional ratios
of the objects depicted in the drawings may differ from those of
the actual objects. The dimensional ratios of objects may also vary
between drawings. The specific dimensional ratios of the objects
should be determined with reference to the following
explanation.
[0017] As shown in FIG. 1 and FIG. 2, the solar module 1 includes a
plurality of solar cell strings 10 each having a plurality of solar
cells 20. More specifically, the solar module 1 includes first
through sixth solar cell strings 10a-10f. As shown in FIG. 2, the
solar cell strings 10 are arranged between a first protecting
member 11 and a second protecting member 12. The first protecting
member 11 is positioned on the light-receiving surface 20a side of
the solar cells 20. The second protecting member 12 is positioned
on the back surface 20b side of the solar cells 20. The second
protecting member 12 has flexible properties. A sealing material
layer 13 is provided between the first protecting member 11 and the
second protecting member 12. The solar cells 20 are sealed in the
sealing material layer 13.
[0018] The first protecting member 11 can be composed of a
translucent member such as a glass substrate or a resin substrate.
The second protecting member 12 can be composed of a flexible
member such as a resin sheet or a resin sheet containing interposed
metal foil. The sealing material layer 13 can be composed of a
resin such as an ethylene-vinyl acetate (EVA) copolymer, polyvinyl
butyral (PVB), polyethylene (PE) or polyurethane (PU). The sealing
material layer 13 preferably includes a non-crosslinked resin.
[0019] Each of the solar cell strings 10 has a plurality of solar
cells 20 arranged in the x-axis direction. As shown in FIG. 1 and
FIG. 3, each solar cell 20 has a photoelectric conversion unit 23,
a first electrode 21, and a second electrode 22.
[0020] The photoelectric conversion unit 23 has a first main
surface 23a and a second main surface 23b. The first main surface
23a of the photoelectric conversion unit 23 comprises the
light-receiving surface 20a of the solar cell 20, and the second
main surface 23b comprises the back surface 20b of the solar cell
20.
[0021] The photoelectric conversion unit 23 is the member that
generates carriers such as holes or electrons when exposed to
light. Carriers may be generated by the photoelectric conversion
unit 23 when light is incident only on the first main surface 23a,
or when light is incident on both the first main surface 23a and on
the second main surface 23b. In other words, the solar cells 20 may
be bifacial solar cells.
[0022] There are no particular restrictions on the type of
photoelectric conversion unit 23. The photoelectric conversion unit
23 can be composed, for example, of a crystalline silicon
substrate.
[0023] A first electrode 21 for collecting one of either holes or
electrons, and a second electrode 22 for collecting the other of
either holes or electrodes are arranged on the second main surface
23b of the photoelectric conversion unit 23. Therefore, each solar
cell 20 is a back contact solar cell.
[0024] There are no particular restrictions on the shape of the
first electrode 21 and the second electrode 22. In the present
embodiment, both the first electrode 21 and the second electrode 22
have a comb shape. The first electrode 21 and the second electrode
22 are interdigitated. More specifically, each of first electrode
21 and the second electrode 22 have a plurality of finger portions
21a, 22a and busbar portions 21b, 22b. Each of the finger portions
21a, 22a extends in the x-axis direction. The finger portions 21a,
22a are interdigitated in the y-axis direction which is orthogonal
to the x-axis direction.
[0025] The finger portions 21a are connected electrically to the
busbar portion 21b. The busbar portion 21b is arranged on one side
(the x1 side) of the finger portions 21a in the x-axis direction.
The busbar portion 21b is provided on the x1 end portion of the
solar cell 20 in the x-axis direction and extends from one end to
the other end of the end portion in the y-axis direction.
[0026] More specifically, the finger portions 22a are connected
electrically to the busbar portion 22b. The busbar portion 22b is
arranged on the other side (the x2 side) of the finger portions 22a
in the x-axis direction. The busbar portion 22b is provided on the
x2 end portion of the solar cell 20 in the x-axis direction and
extends from one end to the other of the end portion in the y-axis
direction.
[0027] As shown in FIG. 1, a plurality of solar cells 20 are
connected electrically via a first wiring member 31 in each of the
solar cell strings 10. More specifically, the first electrode 21 of
one solar cell 20 is connected electrically to the second electrode
22 of another adjacent solar cell 20 in the x-axis direction via a
first wiring member 31.
[0028] The first wiring member 31 can be composed of a flexible
printed circuit (FPC) board having metal foil of Ag or Cu, a
laminate of metal foil, metal foil whose surface is coated with
solder, insulating film, and wiring arranged on the insulating
film.
[0029] The first wiring member 31 is bonded to the back surface 20b
of the solar cell 20 via an adhesive layer (not shown). The
adhesive layer can be composed of a cured resin adhesive, a cured
resin adhesive containing a dispersed metal material, or
solder.
[0030] The first through sixth solar cell strings 10a-10f are
connected electrically via a second wiring member 32. More
specifically, solar cell 20A positioned at the far x2 side of the
first solar cell string 10a and solar cell 20B positioned at the
far x2 side of the second solar cell string 10b, solar cell 20C
positioned at the far x2 side of the third solar cell string 10c
and solar cell 20D positioned at the far x2 side of the fourth
solar cell string 10d, and solar cell 20E positioned at the far x2
side of the fifth solar cell string 10e and solar cell 20F
positioned at the far x2 side of the sixth solar cell string 10f
are connected to each other electrically via a second wiring member
32. The second wiring member 32 electrically connects the first
electrode 21 of solar cells 20A, 20C and 20E to the second
electrode 22 of solar cells 20B, 20D and 20F.
[0031] In addition, solar cell 20H positioned at the far x1 side of
the second solar cell string 10b and solar cell 201 positioned at
the far x1 side of the third solar cell string 10c, and solar cell
20J positioned at the far x1 side of the fourth solar cell string
10d and solar cell 20K positioned at the far x1 side of the fifth
solar cell string 10e are connected to each other electrically via
a second wiring member 32. The second wiring member 32 electrically
connects the first electrode 21 of solar cells 20H and 20J to the
second electrode 22 of solar cells 201 and 20K.
[0032] A first extraction electrode 41 is composed of a portion of
the second wiring member 32 connected electrically to solar cells
20H and 201, and a portion of the second wiring member 32 connected
electrically to solar cells 20J and 20K. As shown in FIG. 2, the
first extraction electrode 41 is drawn from the solar module 1.
More specifically, the tip portion of the first extraction
electrode 41 reaches the outside of the second protecting member
12.
[0033] The second wiring member 32 is composed of two wiring
members 32a and a wiring member 32b. Each of the two wiring members
32a is bonded via an adhesive layer 40 to a solar cell 20 and is
electrically connected to a first electrode 21 or a second
electrode 22. The wiring member 32b is connected electrically to
the two wiring members 32a. The wiring member 32a is arranged on
one end portion of a solar cell 20 in one direction (the x-axis
direction) so as to extend from the end on the y1 side to the end
on the y2 side in the other direction (the y-axis direction) which
is orthogonal to the one direction (the x-axis direction).
[0034] As shown in FIG. 4, wiring member 32a is composed of a
flexible printed circuit board having resin film 51 and wiring 52.
The resin film 51 can be made of a resin such as polyimide (PI) or
polyethylene terephthalate (PET). The wiring 52 is arranged on the
resin film 51. The wiring 52 is connected electrically to a first
electrode 21 or a second electrode 22. The wiring 52 can be
composed of metal foil containing at least one metal such as Cu or
Ag.
[0035] The wiring member 32a has a first portion 32a1, a second
portion 32a2, and a bent portion 32a3. The first portion 32a1
comprises the portion at one end of the wiring member 32a. The
first portion 32a1 is arranged so that the wiring 52 faces the
solar cell 20 side. The first portion 32a1 is bonded to the back
surface 20b of the solar cell 20.
[0036] The second portion 32a2 comprises the portion at the other
end of the wiring member 32a. The second portion 32a2 is arranged
so that the wiring 52 faces the reverse side from the solar cell
20. At least some of the second portion 32a2 is arranged on the
first portion 32a1. In other words, at least some of the second
portion 32a2 overlaps with the first portion 32a1 in the z-axis
direction, which is the thickness direction of the solar cell
20.
[0037] The bent portion 32a3 connects the first portion 32a1 to the
second portion 32a2. The bent portion 32a3 has a bent structure. In
the bent portion 32a3, the wiring 52 faces outward. The bent
portion 32a3 is arranged on the back surface 20b of the solar cell
20. In other words, the bent portion 32a3 overlaps with the solar
cell 20 in the z-axis direction. The bent portion 32a3 is the
portion formed by bending a flat wiring member.
[0038] The wiring member 32b is connected electrically to the
wiring 52 of the wiring member 32a in the second portion 32a2.
Wiring member 32b may be bonded to wiring member 32a using a resin
adhesive. However, in the present embodiment, it is bonded to the
wiring member 32a using solder and is connected electrically to the
wiring 52 of the wiring member 32a.
[0039] The wiring member 32b is bonded to a portion of the wiring
member 32a in the other direction (the y-axis direction). The ratio
of the length of the bonded portion of wiring member 32a and wiring
member 32b in the y-axis direction to the length of wiring member
32a in the y-axis direction ((length of bonded portion of wiring
members 32a and 32b in y-axis direction)/(length of wiring member
32a in y-axis direction)) is preferably from 1/20 to 1, and more
preferably from 1/20 to 1/2.
[0040] A portion of the wiring member 32b is composed of an
extraction electrode 41, and is drawn from the solar module 1.
[0041] In the present embodiment, wiring member 32b is composed of
metal foil made of at least one type of metal such as Cu or Ag. The
thickness of the wiring member 32b is greater than the thickness of
the wiring 52. The thickness of the wiring member 32b is preferably
two or more times the thickness, and more preferably five or more
times the thickness, of the wiring 52.
[0042] The second electrode 22 of the solar cell 20G positioned at
the far x1 end of the first solar cell string 10a and the first
electrode 21 of the solar cell 20L positioned at the far x1 end of
the sixth solar cell string 10f are connected electrically by a
third wiring member 33. The solar cells 20G, 20L and the third
wiring member 33 are bonded via an adhesive layer 40.
[0043] The third wiring member 33 has wiring member 32a and wiring
member 33b. Wiring member 32a comprises a portion of the third
wiring member 33, and has a configuration substantially similar to
wiring member 32a composing a portion of the second wiring member
32. Wiring member 32a composing a portion of the third wiring
member 33 is bonded to and connects electrically the second
electrode 22 of solar cell 20G and the first electrode 21 of solar
cell 20L.
[0044] Wiring member 33b is connected electrically to wiring member
32a composing a portion of the third wiring member 33. A portion of
wiring member 33b comprises an extraction electrode 42 which is
drawn from the solar module 1.
[0045] Wiring member 33b is connected electrically to wiring 52 in
the second portion 32a2 of the wiring member 32a composing a
portion of the third wiring member 33. Wiring member 33b may be
bonded to wiring member 32a using a resin adhesive. However, in the
present embodiment, it is bonded to the wiring member 32a using
solder and is connected electrically to the wiring 52 of the wiring
member 32a. The wiring member 33b is bonded to a portion of the
wiring member 32a in the other direction (the y-axis
direction).
[0046] In the present embodiment, wiring member 33b is composed of
metal foil made of at least one type of metal such as Cu or Ag. The
thickness of the wiring member 33b is greater than the thickness of
the wiring 52. The thickness of the wiring member 33b is preferably
two or more times the thickness, and more preferably five or more
times the thickness, of the wiring 52.
[0047] An insulating sheet 60 is arranged between the wiring 32b,
33b composed of metal foil and the back surface 20b of the solar
cell 20. In this way, short circuiting between the wiring 32b, 33b
and the electrodes 21, 22 can be suppressed. The insulating sheet
60 can be composed of the resin used in the resin film 51 (PI, PET,
etc.) or can be the resin used in the sealing material layer 13
(EVA, PVB, PE, PU, etc.).
[0048] In the present invention, as mentioned above, a bent portion
32a3 is arranged on the solar cells 20. When the solar cells 20 are
laminated in the sealing material layer 13 between the first
protecting member 11 and the second protecting member 12, the
temperature of the solar module 1 rises and the viscosity of the
sealing material layer 13 containing a non-crosslinked resin
decreases. Even when pressure is applied by the bending portion
32a3 towards the solar cells 20, the section of the wiring 52
positioned on the bending portion 32a3 is unlikely to make contact
with the edge 23c of the photoelectric conversion unit 23. This
effectively prevents short circuiting between the section of the
wiring 52 positioned on the bent portion 32a3 and the photoelectric
conversion unit 23. As a result, improved photoelectric conversion
efficiency and improve reliability can be realized.
[0049] By arranging the bent portion 32a3 on the solar cells 20,
the size of the wiring member 32a can be reduced. Therefore, the
manufacturing costs for the solar module 1 can be kept down.
[0050] By arranging the bent portion 32a3 on the solar cells 20,
the size of the solar module 1 can also be reduced.
[0051] In the present invention, the wiring members 32, 33 are
composed of wiring member 32a and either wiring member 32b made of
metal foil or wiring member 33b. In this way, the wiring members
32, 33 can share the same specifications as the wiring member 32a
of resin film 51 and wiring 52, even when many different types of
wiring members 32, 33 are present.
[0052] In the present embodiment, the wiring members 32b, 33b of
metal foil are bonded to a portion of the wiring member 32a in the
y-axis direction. As a result, the wiring members 32b, 33b and the
solar cells 20 are unlikely to be subjected to stress, even when
the temperature of the solar module 1 rises and the wiring members
32b, 33b expand more than the solar cells 20. In this way, damage
to the wiring members 32b, 33b and damage to or warping of the
solar cells 20 can be suppressed. Because the wiring member 32a
uses flexible resin film 51 as its substrate, a large amount of
stress caused by thermal expansion is less likely to occur between
the wiring member 32a and the solar cells 20.
[0053] During the connection process, wiring members 32b and 33b
are preferably fixed to wiring member 32a by placing a
heat-resistant sheet over the solar cells 20, and soldering wiring
member 32a to wiring members 32b and 33b on the heat-resistant
sheet. This suppresses the application of heat from the soldering
to the solar cells 20 and can prevent problems caused by failure.
The insulating sheet 60 arranged between the wiring members 32b,
33b and the back surface 20b of the solar cells 20 may have
heat-resistant properties. In this case, however, the thickness of
the insulating sheet 60 has to be reduced as the thick portions
concentrate force during the modulization process which can cause
the solar cells 20 to crack. Therefore, use of a separate
heat-resistant sheet is preferred.
[0054] The present invention includes various embodiments not
described herein. For example, the first electrode and the second
electrode may be busbarless electrodes which have a plurality of
finger portions but no busbar portion.
[0055] A solar module may also include a single solar cell.
[0056] The present invention includes many other embodiments not
described herein. Therefore, the technical scope of the present
invention is defined solely by the items of the invention specified
in the claims pertinent to the above explanation.
Modified Example
[0057] FIG. 6 is an expanded view of the wiring member 32 in a
modified example. As shown in FIG. 6, the wiring 51 has a wiring
main body 51a and a plurality of linear portions 51b. In the wiring
member 32, a second portion 32a2 and a bent portion 32a3 are
provided in at least the wiring main body 51a. The linear portions
51b are connected to the wiring main body 51a. The linear portions
51b are interdigitated in the y-direction. The linear portions 51b
are connected electrically to finger portions 21a or finger
portions 22a.
[0058] A plurality of openings 51c are provided in the wiring 51 in
the bent portion 32a3 of the wiring member 32. The openings 51c are
arranged in the y-direction, which is the direction in which the
bent portion 32a3 extends. This improves the flexibility of the
bent portion 32a3. This makes it easier to bend a flat member when
the flat member is bent to form wiring member 32. This makes the
wiring member 32 easier to manufacture. Also, when a flat member is
bent to create a wiring member 32 and stress is applied to the bent
portion repeatedly over the temperature cycle, the wiring 32 is
unlikely to become disconnected. Because openings 51c are provided
in the wiring main body 51a and the bent portion 32a3 is formed in
the portion with the wiring main body 51a, disconnected wiring 32
is prevented even more effectively. Because the spacing P1 of the
openings 51c is greater than the width P2 of the linear portions
51b, disconnected wiring 32 is prevented even more effectively. The
spacing P1 of the openings 51c should be greater than the width P2
of the linear portions 51b, and preferably at least 1.5 times
greater. From the standpoint of preventing disconnected wiring 32,
the width P3 of each opening 51c is preferably smaller than the
spacing P1 between openings 51c.
[0059] In the present modified example, the openings 51c have a
rounded rectangular shape to facilitate bending and prevent
disconnection. However, there are no particular restrictions on the
shape of the openings. The shape of the openings may be elliptical,
oval shaped, rectangular or polygonal. The openings may also have a
slender shape which extends in the direction in which the bent
portion 32a3 extends. A single opening 51c may be provided.
Key to the Drawings
[0060] 1: Solar module [0061] 10, 10a-10f: Solar cell strings
[0062] 11: 1st protecting member [0063] 12: 2nd protecting member
[0064] 13: Sealing material layer [0065] 20, 20A-20L: Solar cells
[0066] 20a: Light-receiving surface [0067] 20b: Back surface [0068]
21: 1st electrode [0069] 22: 2nd electrode [0070] 23: Photoelectric
conversion unit [0071] 31-33, 32a, 32b, 33b: Wiring members [0072]
32a1: 1st portion [0073] 32a2: 2nd portion [0074] 32a3: Bent
portion [0075] 51: Resin film [0076] 52: Wiring [0077] 60:
Insulating sheet
* * * * *